122643859 has 4 divisors (see below), whose sum is σ = 132078016. Its totient is φ = 113209704.

The previous prime is 122643853. The next prime is 122643881. The reversal of 122643859 is 958346221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122643859 - 2⁵ = 122643827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122643853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4717059 + ... + 4717084.

It is an arithmetic number, because the mean of its divisors is an integer number (33019504).

Almost surely, 2^122643859 is an apocalyptic number.

122643859 is a deficient number, since it is larger than the sum of its proper divisors (9434157).

122643859 is an equidigital number, since it uses as much as digits as its factorization.

122643859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9434156.

The product of its digits is 103680, while the sum is 40.

The square root of 122643859 is about 11074.4687908721. The cubic root of 122643859 is about 496.8385310259.

The spelling of 122643859 in words is "one hundred twenty-two million, six hundred forty-three thousand, eight hundred fifty-nine".